Non-Positive Semigroup Dynamics in Continuous Variable Models

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dc.creatorBenatti, F.
dc.creatorFloreanini, R.
dc.date2007-05-22
dc.date.accessioned2026-07-07T08:02:48Z
dc.date.available2026-07-07T08:02:48Z
dc.descriptionNon-positive, Markovian semigroups are sometimes used to describe the time evolution of subsystems immersed in an external environment. A widely adopted prescription to avoid the appearance of negative probabilities is to eliminate from the admissible initial conditions those density matrices that would not remain positive by the action of the semigroup dynamics. Using a continuous variable model, we show that this procedure leads to physical inconsistencies when two subsystems are considered and their initial state is entangled.
dc.description10 pages, LaTex
dc.identifierhttps://arxiv.org/abs/0705.3096
dc.identifierhttp://arxiv.org/abs/0705.3096
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/129346
dc.subjectQuantum Physics
dc.titleNon-Positive Semigroup Dynamics in Continuous Variable Models
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